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Journal of Nanomaterials
Volume 2012 (2012), Article ID 532847, 5 pages
Research Article

Effects of EDTA and Boric Acid on the Morphology of Particles

1National Carbon Fiber Engineering Research Center, Beijing University of Chemical Technology, Beijing 100029, China
2Jilin Petrochemical Co. Ltd., PetroChina, Jilin 132021, China

Received 31 July 2012; Accepted 30 November 2012

Academic Editor: Sung Oh Cho

Copyright © 2012 Xingbo Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Calcium carbonate (CaCO3) particles with different morphologies were prepared using calcium chloride (CaCl2) and sodium carbonate (Na2CO3) aqueous solutions containing various amounts of ethylenediamine tetraacetic acid (EDTA) or boric acid. The products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The sphere-like CaCO3 particle was inclined to be formed in EDTA or boric acid solution at room temperature. The surface of CaCO3 is smooth in the presence of EDTA, and the crystal structure of CaCO3 is majorly vaterite. However, the CaCO3 has a rough surface in boric acid solution and pure calcite structure. The size of CaCO3 particle decreases with the increase in the amount of EDTA or boric acid.